Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1986-02-25
1988-03-01
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
342156, G01S 502
Patent
active
047289589
ABSTRACT:
An emitter location system includes a single carrier based first and second short baseline interferometers, and a long baseline interferometer operatively connected to a computing means. The computing means includes a three level processor. The short baseline interferometers provide phase measurements for level one combination into total phase measurements and estimates of the angle of incidence of the incoming electromagnetic energy. After test for acceptance, the estimated angle of incidence is passed for level two processing which includes the simultaneous processing of the estimated incident angle with the phase measurement of the long baseline interferometer for error correction to provide an improved estimated incident angle. After test for acceptance, the improved angle of incidence measurement is passed for determining the angle of the incident wave for level three processing. Level three processing utilizes the bearing estimates and the carrier position and heading information for an inertial navigation system to relate the information to a fixed coordinate system. Then the location of the emitter is determined using least square method.
REFERENCES:
patent: 3787863 (1974-01-01), Watanabe et al.
patent: 3795000 (1974-02-01), Bell, Jr. et al.
patent: 4136342 (1979-01-01), Alcock et al.
patent: 4160252 (1979-07-01), Lucas et al.
patent: 4466067 (1984-08-01), Fontana
patent: 4532515 (1985-07-01), Cantrell et al.
Blum Theodore M.
Comfort James T.
Robinson Richard K.
Sharp Melvin
Sotomayor John B.
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